DAC test

CD4069 outputs are referenced to supply median

checking if such produces a linear ramp . . .
all fun of resolving a simple 3 - supply voltage divider (finding the formula for U_X)

. . . checking if such produces a linear ramp in excel . . .
-- the value 1/2 used in LT Spice seems to be incorrect . . .

---

[Eop]